<template>
    <div class="todo-footer" v-show="total">
    <label>
      <!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> -->
      <input type="checkbox" v-model="isAll" @change="checkAll()"/>
    </label>
    <span>
      <span>已完成{{ doneTotal }}</span> / 全部{{ total }}
    </span>
    <button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
  </div>
</template>

<script>

export default {
    name:'abcfooter',
    props:['todos'],
    computed:{
      total()
      {
            return this.todos.length
      },
      doneTotal()
      {
       let i = 0
       this.todos.forEach(todo => {
        if(todo.done)
        {
          i++
        }
       });
       return i
      // this.todos.reduce((pre,current)=>{
      //    return pre + (current.done ? 1 : 0)
      // },0)
    
      },
      isAll:
      {
       get()
       {
           return this.doneTotal === this.total && this.total > 0 
       },
       set(Value)
       {
          // this.checkAllTodo(Value)
          this.$emit('checkAllTodo',Value)
       }
      }
    },
    methods: {
    clearAll()
    {
        this.$emit('clearAllTodo')
    }
    },
}
</script>

<style scoped>
  /*footer*/
  .todo-footer {height: 40px;line-height: 40px;padding-left: 6px;margin-top: 5px;}
  .todo-footer label {display: inline-block;margin-right: 20px;cursor: pointer;}
  .todo-footer label input {position: relative;top: -1px;vertical-align: middle;
    margin-right: 5px;}
  .todo-footer button {float: right;margin-top: 5px;}
</style>